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public:modeles:rotor_23b:accueil [2022/09/16 10:13] – supprimée - modification externe (Unknown date) 127.0.0.1 | public:modeles:rotor_23b:accueil [2023/04/09 23:38] – ikrambeghdadi | ||
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+ | ====== Rotor 23B ====== | ||
+ | |||
+ | < | ||
+ | * [[# | ||
+ | * [[# | ||
+ | <pane id=" | ||
+ | |||
+ | <btn type=" | ||
+ | <modal id=" | ||
+ | **[[https:// | ||
+ | </ | ||
+ | ===== About ===== | ||
+ | |||
+ | Rotor 23B is part of a research program to study the effects of aspect ratio, diffusion factor, and solidity on rotors. To do so, experimental studies have been conducted on a series of high-hub-tip-radius-ratio compressor stages representative of the middle and latter stages of axial-flow compressors. In fact, 14 middle stages were tested to assess the effects on performance of varying both diffusion through the rotor and stator blades and blade aspect ratio. Among these 14 stages, there are rotors 23B, 24A, 25A, 26B, 27A and 28B. Both the tip diameter and the hub-tip radius ratio were held constant throughout each stage at 50.8 centimeters and 0.8, respectively. | ||
+ | |||
+ | * Original technical report [(cite: | ||
+ | author | ||
+ | date = {1979}, | ||
+ | institution | ||
+ | title = {Effects of Diffusion Factor, Aspect Ratio, and Solidity on Overall Performance of 14 Compressor Middle Stages}, | ||
+ | number | ||
+ | url = {https:// | ||
+ | } | ||
+ | </ | ||
+ | * Picture : | ||
+ | {{ : | ||
+ | < | ||
+ | * < | ||
+ | author | ||
+ | title = {Rotor 23B - Stator 20B. {R}ecords of the {N}ational {A}eronautics and {S}pace {A}dministration, | ||
+ | url = {https:// | ||
+ | </ | ||
+ | |||
+ | <callout type=" | ||
+ | * [[https:// | ||
+ | * {{ : | ||
+ | * {{ : | ||
+ | </ | ||
+ | |||
+ | |||
+ | ===== Reference blade ===== | ||
+ | |||
+ | The **reference blade** is defined with multiple-circular arc profiles[(cite: | ||
+ | |||
+ | |||
+ | ==== Geometry ==== | ||
+ | |||
+ | The geometry of rotor 23B is described in the [[https:// | ||
+ | {{ : | ||
+ | |||
+ | ==== Aerodynamic design | ||
+ | |||
+ | ^ ^ unit ^ value ^ | ||
+ | ^ pressure ratio | [-] | 1.257 | | ||
+ | ^ mass flow | ||
+ | ^ tip speed | ||
+ | ^ tip solidity | ||
+ | ^ aspect ratio | [-] | 1 | | ||
+ | ^ number of blades | ||
+ | ^ rotative speed | [rad/ | ||
+ | |||
+ | ===== Material properties | ||
+ | |||
+ | The original material of the rotor 21 is not defined in the NASA report. A generic titanium Ti-6Al-4V is considered: | ||
+ | |||
+ | ^ | ||
+ | ^ alloy | [-] | Ti-6Al-4V | ||
+ | ^ Young' | ||
+ | ^ density | ||
+ | ^ Poisson' | ||
+ | ^ yield stress | ||
+ | |||
+ | |||
+ | ==== CAD model ==== | ||
+ | |||
+ | The CAD model is computed with the open source code OpenMCAD[(cite: | ||
+ | |||
+ | < | ||
+ | <col md=" | ||
+ | </ | ||
+ | <col md=" | ||
+ | {{ : | ||
+ | < | ||
+ | </ | ||
+ | <col md=" | ||
+ | {{ : | ||
+ | < | ||
+ | </ | ||
+ | <col md=" | ||
+ | </ | ||
+ | </ | ||
+ | |||
+ | |||
+ | ==== Natural frequencies ==== | ||
+ | |||
+ | |||
+ | First three natural frequencies (with clamped root) for the mesh computed with OpenMCAD[(cite: | ||
+ | |||
+ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
+ | | 1 | 1B | 6548.4 | ||
+ | | 2 | 1T | 15063.74 | ||
+ | | 3 | 2B | 28660.44 | ||
+ | |||
+ | |||
+ | |||
+ | ===== Initial blade ===== | ||
+ | |||
+ | The **initial blade** is defined with in-house LAVA parameters[(cite: | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | ==== Natural frequencies ==== | ||
+ | |||
+ | First three natural frequencies (with clamped root) | ||
+ | |||
+ | * from the whole mesh: | ||
+ | |||
+ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
+ | | 1 | 1B | 6612.49 | ||
+ | | 2 | 1T | 15121.8 | ||
+ | | 3 | 2B | 28889.33 | ||
+ | |||
+ | |||
+ | * from the reduced order model: | ||
+ | |||
+ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
+ | | 1 | 1B | 6613.05 | ||
+ | | 2 | 1T | 15126.14 | ||
+ | | 3 | 2B | 28946.25 | ||
+ | |||
+ | |||
+ | |||
+ | </ | ||
+ | |||
+ | <pane id=" | ||
+ | |||
+ | <btn type=" | ||
+ | <modal id=" | ||
+ | **[[https:// | ||
+ | </ | ||
+ | |||
+ | ===== À propos ===== | ||
+ | |||
+ | Le rotor 23B fait partie d'un programme de recherche visant à étudier les effets de l’allongement, | ||
+ | |||
+ | |||
+ | * Rapport technique original [(cite: | ||
+ | author | ||
+ | date = {1979}, | ||
+ | institution | ||
+ | title = {Effects of Diffusion Factor, Aspect Ratio, and Solidity on Overall Performance of 14 Compressor Middle Stages}, | ||
+ | number | ||
+ | url = {https:// | ||
+ | } | ||
+ | </ | ||
+ | * Photographie : | ||
+ | {{ : | ||
+ | < | ||
+ | * < | ||
+ | author | ||
+ | title = {Rotor 23B - Stator 20B. {R}ecords of the {N}ational {A}eronautics and {S}pace {A}dministration, | ||
+ | url = {https:// | ||
+ | </ | ||
+ | |||
+ | |||
+ | <callout type=" | ||
+ | * [[https:// | ||
+ | * {{ : | ||
+ | * {{ : | ||
+ | </ | ||
+ | |||
+ | |||
+ | ===== Aube de référence ===== | ||
+ | |||
+ | L' | ||
+ | |||
+ | ==== Géométrie ==== | ||
+ | |||
+ | La géométrie du rotor 23B est décrite dans le [[https:// | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | ==== Caractéristiques aérodynamiques | ||
+ | ^ ^ unités | ||
+ | ^ taux de compression | ||
+ | ^ débit massique | ||
+ | ^ vitesse en tête | [m/s] | 243,8 | | ||
+ | ^ solidité en tête | ||
+ | ^ allongement | ||
+ | ^ nombre d' | ||
+ | ^ vitesse de rotation | ||
+ | |||
+ | ===== Propriétés matériau | ||
+ | |||
+ | Le matériau original du rotor 21 n'est pas défini dans le rapport de la NASA. Un alliage de titane Ti-6Al-4v est considéré : | ||
+ | |||
+ | ^ | ||
+ | ^ alliage | ||
+ | ^ module d' | ||
+ | ^ masse volumique | ||
+ | ^ coefficient de Poisson | ||
+ | ^ limite élastique | ||
+ | |||
+ | |||
+ | ==== Modèle CAO ==== | ||
+ | |||
+ | Le modèle CAO est obtenu avec OpenMCAD[(cite: | ||
+ | |||
+ | < | ||
+ | <col md=" | ||
+ | </ | ||
+ | <col md=" | ||
+ | {{ : | ||
+ | < | ||
+ | </ | ||
+ | <col md=" | ||
+ | {{ : | ||
+ | < | ||
+ | </ | ||
+ | <col md=" | ||
+ | </ | ||
+ | </ | ||
+ | |||
+ | ==== Fréquences propres ==== | ||
+ | |||
+ | Fréquences des trois premiers modes (noeuds du pied d'aube encastrés) pour le maillage obtenu avec OpenMCAD[(cite: | ||
+ | |||
+ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
+ | | 1 | 1F | 6548, | ||
+ | | 2 | 1T | 15063, | ||
+ | | 3 | 2F | 28660, | ||
+ | |||
+ | |||
+ | ===== Aube initiale ===== | ||
+ | |||
+ | L' | ||
+ | |||
+ | |||
+ | ==== Fréquences propres ==== | ||
+ | Fréquences des trois premiers modes (noeuds du pied d'aube encastrés), | ||
+ | |||
+ | * pour le maillage complet : | ||
+ | |||
+ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
+ | | 1 | 1F | 6612, | ||
+ | | 2 | 1T | 15121, | ||
+ | | 3 | 2F | 28889, | ||
+ | |||
+ | |||
+ | * pour le modèle réduit : | ||
+ | |||
+ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
+ | | 1 | 1F | 6613, | ||
+ | | 2 | 1T | 15126, | ||
+ | | 3 | 2F | 28946, | ||
+ | |||
+ | |||
+ | |||
+ | </ | ||
+ | </ | ||
+ | |||
+ | |||
+ | |||
+ | |||
- public/modeles/rotor_23b/accueil.txt
- Dernière modification : 2023/04/15 13:39
- de ikrambeghdadi